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Voice over LTE

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VoLTE, an acronym for Voice over LTE, which is based on the IP Multimedia Subsystem (IMS) network, with specific profiles for control and media planes of voice service on LTE defined by GSMA in PRD IR.92.[1] This approach results in the voice service (control and media planes) being delivered as data flows within the LTE data bearer. This means that there is no dependency on (or ultimately, requirement for) the legacy circuit-switched voice network to be maintained. VoLTE has up to three times more voice and data capacity than 3G UMTS and up to six times more than 2G GSM. Furthermore, it frees up bandwidth because VoLTE’s packets headers are smaller than those of unoptimized VoIP/LTE.[2]

History

In May 2014, SingTel introduced the world's first commercial "full-featured" VoLTE service in Singapore, initially only in combination with the Galaxy Note 3.[3]

In June 2014, KT showcased the world’s first cross-border roaming services based on Voice over LTE. The South Korean operator partnered with China Mobile to develop VoLTE roaming services.[4]

In October 2014, China Mobile, KPN and iBasis were said that they have successfully implemented the first international VoLTE roaming between mobile operators based on IMS local breakout architecture with a home routing systems.[5]

Deployment

Operator Country Status Date Note
Optus  Australia trialed [6]
Telstra  Australia planned 2014 [7]
Vodafone  Australia planned 2015 [8]
A1  Austria planned 2015 [9]
Azercell  Azerbaijan planned [10]
Telus  Canada planned [11]
China Mobile  China planned 2014 [12]
Avantel  Colombia planned [13]
CNT  Ecuador planned [14]
Bouygues  France planned 2015 [15]
SFR  France trialed [16]
E-Plus  Germany planned [17]
O2  Germany in trial [18]
Telekom  Germany trialed [19]
3  Hong Kong launched May 2014 [20]
PCCW  Hong Kong launched May 2014 [21]
Airtel  India trialed [22]
au  Japan planned [23]
NTT Docomo  Japan launched June 2014 [24]
Ooredoo  Kuwait planned 2014 [25]
Zain  Kuwait trialed [26]
Alfa  Lebanon planned 2014 [27]
Vip  Macedonia planned 2015 [28]
KPN  Netherlands in trial [29]
Vodafone  Netherlands planned 2015 [30]
Smile  Nigeria trialed [31]
Plus  Poland trialed [32]
MegaFon  Russia in trial [33]
MTS  Russia trialed [34]
Vimpelcom  Russia trialed [35]
Etisalat  Saudi Arabia trialed [36]
Mobily  Saudi Arabia planned [37]
M1  Singapore planned 2014 [38]
SingTel  Singapore launched May 2014 [3]
StarHub  Singapore trialed 2014 [38]
Vodafone  Spain in trial [39]
Telekom Slovenije  Slovenia planned [40]
Vodacom  South Africa trialed [41]
KT  South Korea launched October 2012 [42]
LG U+  South Korea launched August 2012 [43]
SK Telecom  South Korea launched August 2012 [44]
Tele2  Sweden trialed [45]
Swisscom   Switzerland planned 2015 [46]
APT  Taiwan planned [47]
Smile  Tanzania trialed [31]
Altyn Asyr  Turkmenistan launched September 2014 [48]
Smile  Uganda trialed [31]
du  United Arab Emirates trialed [49]
EE  United Kingdom planned [50]
Vodafone  United Kingdom trialed [51]
AT&T  United States launched May 2014 [52]
C Spire  United States planned [53]
MetroPCS  United States launched August 2012 [54]
T-Mobile  United States launched May 2014 [52]
Verizon  United States launched September 2014 [55]
Digitel  Venezuela planned [56]

Devices

Brand Name Note
Apple iPhone 6 [57]
iPhone 6 Plus [57]
Fujitsu Arrows NX [58] F-05F
Huawei Ascend D2 LTE [59]
LG G Flex [60]
G Pro [59] F240S
G2 [55]
Optimus GX [59] F310L
Optimus LTE 2 [59] F160LV
Optimus LTE III [59] F260S
Optimus Vu 2 [59] F200L
Vu 3 [59] F300
Pantech Vega Iron [59] IM-A870S
Vega N°6 [59] IM-A860S
Vega R3 [59] IM-A850L
Vega Secret Note [59] IM-A890S
Samsung Galaxy Golden [59] SHV-E400
Galaxy Grand [59] SHV-E270
Galaxy Light [60]
Galaxy Note II LTE [59] SHV-E250S
Galaxy Note 3 [3][21]
Galaxy Note 10.1 LTE [59]
Galaxy Pop [59] SHV-E220S
Galaxy Round [59] SM-G910S
Galaxy S III LTE [59] SHV-E210
Galaxy S4 [59] SCH-R970C
Galaxy S4 mini [52]
Galaxy S4 Zoom [59] SM-C105S
Galaxy S5 [60]
Galaxy Win [59] SHV-E500S
Sharp Aquos Pad [58] SH-06F
Aquos Zeta [58] SH-04F
Sony Xperia M35t [59]
Xperia Z2 [58] SO-03F
Xperia Z2 Tablet [58] SO-05F

Voice quality

To ensure compatibility, 3GPP demands at least AMR-NB codec (narrow band), but the recommended speech codec for VoLTE is Adaptive Multi-Rate Wideband, also known as HD Voice. This codec is mandated in 3GPP networks that support 16 kHz sampling.[61]

Fraunhofer IIS has proposed and demonstrated "Full-HD Voice", an implementation of the AAC-ELD (Advanced Audio Coding – Enhanced Low Delay) codec for LTE handsets. Where previous cell phone voice codecs only supported frequencies up to 3.5 kHz and upcoming wideband audio services branded as HD Voice up to 7 kHz, Full-HD Voice supports the entire bandwidth range from 20 Hz to 20 kHz. For end-to-end Full-HD Voice calls to succeed however, both the caller and recipient's handsets as well as networks have to support the feature.[62]

See also

References

  1. ^ Nick Russell (3 March 2013). "Official Document IR.92 - IMS Profile for Voice and SMS" (PDF). GSMA. Retrieved 14 September 2014.
  2. ^ Elkin, Ed (10 April 2014). "The Secret Value of VoLTE". TMCnet. Retrieved 14 September 2014.
  3. ^ a b c "SingTel, Samsung and Ericsson unveil world's first full-featured Voice over LTE service". SingTel. 19 May 2014. Retrieved 4 August 2014.
  4. ^ "KT and China Mobile claim world first for cross-border VoLTE roaming". TeleGeography. 13 June 2014. Retrieved 14 September 2014.
  5. ^ "China, KPN, iBasis implement first VoLTE roaming calls". Telecompaper. 2014-10-14. Retrieved 2014-10-14.
  6. ^ Josh Taylor (25 November 2013). "Optus joins Voice over LTE race". ZDNet. Retrieved 14 September 2014.
  7. ^ Josh Taylor (21 November 2013). "Telstra tests Voice over LTE". ZDNet. Retrieved 14 September 2014.
  8. ^ Anthony Flannery (20 August 2014). "Vodafone to build network of the future" (PDF). Vodafone. Retrieved 14 September 2014.
  9. ^ Livia Dandrea-Böhm (24 June 2014). "VoLTE: A1 testet als erster Netzbetreiber Österreichs Sprachtelefonie über 4G/LTE im Live-Netz" (in German). A1. Retrieved 14 September 2014.
  10. ^ "Azercell to offer VoLTE". TeleGeography. 23 August 2013. Retrieved 15 September 2014.
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  13. ^ "Avantel enlists NSN for complete LTE rollout". TeleGeography. 21 January 2014. Retrieved 15 September 2014.
  14. ^ "CNT launches LTE data packages for pre- and post-paid users". TeleGeography. 13 March 2014. Retrieved 15 September 2014.
  15. ^ "Ericsson Wins French VoLTE Deployment Contract". cellular-news. 21 May 2014. Retrieved 14 September 2014.
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  19. ^ Markus Weidner (10 September 2013). "LTE+ bei der Telekom im Test: Knapp 120 MBit/s auf der IFA" (in German). teltarif.de. Retrieved 14 September 2014.
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  21. ^ a b "PCCW (HKT) launches VoLTE; 3 HK not far behind". TeleGeography. 16 May 2014. Retrieved 14 September 2014.
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  27. ^ "Alfa tests VoLTE on live network, launch scheduled for year-end". TeleGeography. 27 February 2014. Retrieved 15 September 2014.
  28. ^ Michael Carroll (25 July 2013). "Vip Operator confirms Macedonia 4G license". Fierce Wireless. Retrieved 14 September 2014.
  29. ^ "KPN follows LTE-A launch with VoLTE trial". TeleGeography. 28 July 2014. Retrieved 14 September 2014.
  30. ^ "Vodafone demos LTE Advanced in Amsterdam". Telecompaper. 19 June 2014. Retrieved 14 September 2014.
  31. ^ a b c "Reasons to be cheerful? Smile Communications tests VoLTE". TeleGeography. 8 January 2014. Retrieved 15 September 2014.
  32. ^ "Polkomtel, Huawei complete VoLTE testing". Telecompaper. 25 September 2014. Retrieved 25 September 2014.
  33. ^ "Megafon tests VoLTE". Telecompaper. 12 September 2014. Retrieved 14 September 2014.
  34. ^ "MTS launches LTE in St Petersburg; tests VoLTE". TeleGeography. 15 April 2014. Retrieved 15 September 2014.
  35. ^ "Vimpelcom tests 'seamless' VoLTE in Russia". TeleGeography. 1 April 2014. Retrieved 15 September 2014.
  36. ^ "Etisalat completes tests of VoLTE and eSRVCC". TeleGeography. 14 May 2013. Retrieved 15 September 2014.
  37. ^ "Mobily, Ericsson to upgrade EPC network in Western region". TeleGeography. 17 May 2013. Retrieved 15 September 2014.
  38. ^ a b Sidney Wong (20 May 2014). "M1 and StarHub to Jump On VoLTE Bandwagon Soon". Retrieved 15 September 2014.
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  40. ^ "Telekom Slovenije selects Ericsson for 4G core, radio, VoLTE deployments". TeleGeography. 16 November 2012. Retrieved 15 September 2014.
  41. ^ "Vodacom SA trials VoLTE technology; HD Voice-over-3G currently in deployment". TeleGeography. 29 September 2014. Retrieved 29 September 2014.
  42. ^ "KT to offer LTE voice in October". Telecompaper. 25 July 2012. Retrieved 14 September 2014.
  43. ^ "LG Uplus inaugurates commercial VoLTE service". TeleGeography. 31 Aug 2012. Retrieved 14 September 2014.
  44. ^ "SKT launches commercial VoLTE service". TeleGeography. 8 August 2012. Retrieved 14 September 2014.
  45. ^ "Tele2 'first in Europe' to test VoLTE". TeleGeography. 21 December 2012. Retrieved 15 September 2014.
  46. ^ "Swisscom testet LTE mit bis zu 450 MBit/s" (in German). teltarif.de. 2014-10-08. Retrieved 2014-10-09.
  47. ^ "APT calls on Alca-Lu for VoLTE technology deployment". TeleGeography. 14 March 2014. Retrieved 15 September 2014.
  48. ^ "Altyn Asyr introduces voice over LTE". Telecompaper. 29 September 2014. Retrieved 29 September 2014.
  49. ^ "Du prepares for VoLTE launch". TeleGeography. 5 August 2014. Retrieved 15 September 2014.
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  51. ^ "Vodafone UK completes lab test of VoLTE". TeleGeography. 7 August 2014. Retrieved 14 September 2014.
  52. ^ a b c Chris Welch (22 May 2014). "T-Mobile lights up VoLTE in the US, AT&T to follow tomorrow". The Verge. Retrieved 14 September 2014.
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  55. ^ a b Ryan Whitwam (15 September 2014). "Verizon's Advanced Calling 1.0 Rolls Out Today, Enabling VoLTE And Video Calls On Supported Devices". Retrieved 15 September 2014.
  56. ^ "Digitel has around 100,000 LTE subscribers, 900 base stations". TeleGeography. 21 July 2014. Retrieved 15 September 2014.
  57. ^ a b Greg Kumparak (9 September 2014). "Apple Announces Two New iPhones: iPhone 6 And iPhone 6 Plus". TechCrunch. Retrieved 14 September 2014.
  58. ^ a b c d e "VoLTE（ボルテ）" (in Japanese). NTT DoCoMo. Retrieved 2014-09-18.
  59. ^ a b c d e f g h i j k l m n o p q r s t u v "HD voice (W-AMR) mobile phones and suppliers report: 329 phones (incl. VoLTE), 19 suppliers" (PDF). GSA. 21 March 2014. Retrieved 15 September 2014.
  60. ^ a b c Phil Nickinson (18 June 2014). "Samsung Galaxy S5 joins T-Mobile's VOLTE ranks". Android Central. Retrieved 14 September 2014.
  61. ^ "LTE delivers superior voice, too" (PDF). Ericsson. 2010. Retrieved 14 September 2014.
  62. ^ "Fraunhofer IIS Presents the World's First Full-HD Voice Calls on Android Phones over LTE at Mobile World Congress 2012" (PDF). Fraunhofer IIS. 23 February 2012. Retrieved 14 September 2014.
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